The bartender brings him the three beers, and the man proceeds to alternately sip one, then the other, then the third, until they're gone.
He then orders three more and the bartender says, "Sir, I know you like them cold, so you can start with one, and I'll bring you a fresh one as soon as you're low."
The man says, "You don't understand. I have two brothers, one in Australia and one in the Ireland. We made a vow to each other that every Saturday night, we'd still drink together. So right now, my brothers have three beers, too, and we're drinking...